Visible-Light Photoredox Difluoromethylation of Phenols and Thiophenols with Commercially Available Difluorobromoacetic Acid
作者:Jinyan Yang、Min Jiang、Yunhe Jin、Haijun Yang、Hua Fu
DOI:10.1021/acs.orglett.7b01118
日期:2017.5.19
A simple and efficient visible-light photoredox one-pot method for difluoromethylation of phenols and thiophenols has been developed. The protocol uses commerciallyavailable, inexpensive, and easy handling difluorobromoacetic acid as the difluoromethylating agent, and the diverse O- and S-difluoromethylated products were prepared in good yields with tolerance of many functional groups.
Visible light-promoted difluoromethylthiolation of aryldiazonium salts
作者:Wengui Wang、Shuxiang Zhang、Huaiqing Zhao、Shoufeng Wang
DOI:10.1039/c8ob02431f
日期:——
Difluoromethylthiolation of aryldiazoniumsalts under photocatalytic conditions with a shelf-stable, easily prepared and inexpensive reagent, PhSO2SCF2H was described. A variety of difluoromethylthioethers were obtained utilizing aryldiazoniumsalts containing different functional groups. Aryldiazoniumsalts with a heteroarene moiety were tolerated. Fluorescence quenching experiments indicated that
Direct Difluoromethylation of Alcohols with an Electrophilic Difluoromethylated Sulfonium Ylide
作者:Jiansheng Zhu、Yafei Liu、Qilong Shen
DOI:10.1002/anie.201603166
日期:2016.7.25
mild reaction conditions and with good functional‐group tolerance was developed. The development of the method was based on the invention of a stable, electrophilic, difluoromethylating reagent, difluoromethyl‐(4‐nitrophenyl)‐bis(carbomethoxy) methylide sulfonium ylide, which was synthesized by reaction of the easily available 4‐nitrophenyl (difluoromethyl)thioether and dimethyl diazomalonate in the
A new method for the preparation of fluoroalkylthioethers including trifluoromethylthioether and difluoromethylthioether by iridium(I)-catalyzed deoxgenation of fluoroalkylsulfoxides with dimethyl diazomalonate was developed. In the reaction system, dimethyl diazomalonate was used as reducing reagent and the corresponding fluoroalkylthioethers were produced through oxygen atom transfer from fluoroalkylsulfoxides